Expand description

tor-linkspec: Descriptions of Tor relays, as used to connect to them.


The tor-linkspec crate provides traits and data structures that describe how to connect to Tor relays.

When describing the location of a Tor relay on the network, the Tor protocol uses a set of “link specifiers”, each of which corresponds to a single aspect of the relay’s location or identity—such as its IP address and port, its Ed25519 identity key, its (legacy) RSA identity fingerprint, or so on. This crate’s LinkSpec type encodes these structures.

When a client is building a circuit through the Tor network, it needs to know certain information about the relays in that circuit. This crate’s ChanTarget and CircTarget traits represent objects that describe a relay on the network that a client can use as the first hop, or as any hop, in a circuit.

This crate is part of Arti, a project to implement Tor in Rust. Several other crates in Arti depend on it. You will probably not need this crate yourself unless you are interacting with the Tor protocol at a fairly low level.

tor-linkspec is a separate crate so that it can be used by other crates that expose link specifiers and by crates that consume them.

Future work

TODO: Possibly we should rename this crate. “Linkspec” is a pretty esoteric term in the Tor protocols.

TODO: Possibly the link specifiers and the *Target traits belong in different crates.


OwnedChanTarget is a summary of a ChanTarget that owns all of its members.

OwnedCircTarget is a summary of a CircTarget that owns all its members.


A piece of information about a relay and how to connect to it.


Information about a Tor relay used to connect to it.

Information about a Tor relay used to extend a circuit to it.